<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>诛仙2</title>
        <style>
            table{
                border-collapse: collapse;
                width: 100%;
            }
            table,th,td{
                border: 1px solid black;
            }
            th{
                height: 50px;
                background-color: green;
                color: white;
            }
        </style>
    </head>
    <body>
        <table>
            <tr>
                <th>序号</th>
                <th>姓名</th>
                <th>年龄</th>
            </tr>
            <tr>
                <td>1</td>
                <td>张三</td>
                <td>18</td>
            </tr>
            <tr>
                <td>2</td>
                <td>李四</td>
                <td>18</td>
            </tr>
            <tr>
                <td>3</td>
                <td>王五</td>
                <td>28</td>
            </tr>
        </table>
    </body>
</html>